trouble with one’s back
背痛之苦
avoid protracted exertion
避免久劳
trouble-free service
安全工作
rated perceived exertion
分级自感用力度
trouble free service
安全工作
Syncope on exertion
奋力性晕厥
too much exertion to breathe
呼吸吃力
dyspnoea on exertion
活动时气急
trouble-shooting time
查错所需时间
avoid exertion in hunger and fullness
饥饱勿劳
shortness of breath on exertion
劳累性气促
hemoglobinuria from exertion
劳力性血红蛋白尿